Red HatCVE-2026-77159
A symlink-following flaw was found in libvirt's qemuTPMEmulatorPrepareHost
Medium5.5CVE-2026-77159 · Published Sep 11, 2026 · updated Sep 16, 2026
A symlink-following flaw was found in libvirt's qemuTPMEmulatorPrepareHost() function. The function uses a path-based chown() on the swtpm logfile without checking for symbolic links. A local attacker with access to the swtpm account can replace the logfile with a symlink, causing libvirtd (running as root) to transfer ownership of an arbitrary file to the swtpm user.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 6 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 7 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 8 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 9 Product | all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-61
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 11 | Red Hat Enterprise Linux 10: denial of service | Medium6.2 | No fix yet |
| Sep 11 | Red Hat Ceph Storage 4: buffer overflow | Medium6.1 | No fix yet |
| Sep 11 | Red Hat Dynamic Client Registration service of Keycloak: information disclosure | Medium4.9 | No fix yet |
| Sep 11 | Red Hat, Inc.: CVE: user could modify a managed cluster’s ManagedClusterAddOn | High7.7 | No fix yet |
| Sep 11 | Red Hat GStreamer: integer overflow | Medium4.4 | No fix yet |
| Sep 10 | Red Hat admin backend of gvfs: race condition | High7.0 | 1.62.0+2 more |